Tool-support for lathes



E. J. AND G. C. DU BOIS.

TOOL SUPPORT FOR LATHES.

APPLICATION FILED FEB. 11, 19:1.

1 $23,682, I I Patented Dec. 2, 1919.

2 SHEETS-SHEET l.

'E.1. AND G. C. DU BOIS.

' TOOL SUPPORT FOR LATHES.

APPLICATION FILED FEB. 17. 1917.

1,323,682. 7 Patented Dec. 2, 1919.

2 SHEETS-SHEET 2.

Fig.7.

In zzemtor'g A tool, 12, is carried by the tool-holder, 5, it being immaterial whether said tool is integral with, or separate from the tool-holder.

lVe have shown the upper flat surface, 11, or the bolster roughened by means of transverse steps or ribs whereby it is adapted tomake better frictional engagement with the tool-holder, 5.

The steps or ribs 011 the seats, 7 and 8, and upon the seating surface, 10, of the bolster, are so formed that the steps or ribs on the bolster interlockingly engage the steps or ribs on the seat, 7 or 8, so that it is impossible for the bolster to slip out of its adjusted position in use, so long as the clamp-screw, 3, remains tightly set up.

e have shown the steppedseats, 7 and 8, formed diametrically of the washer, 6, whereby the tool and the tool-supportingbolster are located directly in line with the clamp-screw, 3.

V979 have also shown side walls on the washer, (3-, on opposite sides oi the respectivestepped seatsbetween which side walls the bolster is confined, whereby the bolster is laterally supported in position for the stepped curved surface on the bolster to accurately engage the Stepped seats on the washer, 6.

What we claim as new and desire to secure by Letters Patent is l. The combination with a tool-rest having diametrical intersecting curved bolsterseats at different heights, and of uniform width; and a tool-post mounted'upon said toolrest of a bolster alternatively engageable with the several bolster-seats on said tool-rest; and a clamp-screw on said toolpost cooperative with saidbolster to clamp ther'eaga'inst a tool holder, v

2. The combination with a rotatively mountedtool-rest having diametrical inter: seating eurvedrstepped bolster-seats at different heights, and of uniform width; and a tool-post mounted upon, said tool-rest; of a bolster having a curved stepped surface alternatively engageable with the several bolster-seats on said tool-rest; and a clampscrew on said tool-post cooperative with sand bolster to clam thereagainst a tool-holder;

3, The comblnation with a tool-rest; of tool-post mounted upon said tool-rest; a washer encircling the tool-post supported by said tool-rest, said washer having diametrical intersecting curved stepped. bolsterseats at different heights, and of uniform width, with side-walls on opposite sides of the respective seats; a bolster having a curved stepped surface alternatively engageable with the respective stepped seats on said washer, and adaptedto beicontined between the side-walls oi the respective seat; and a clai'np-screw mounted on said toolpost cooperative with said bolster to clamp thereagainst a tool-holder.-

In testimony whereof, we have hereunto set our hands this 6th day. of February, 1917. h i

EDWARD J. DU BOIS. *GEO. G. DU B013. 7

Witnesses i A. A. BRANTLIN, A. METZNER. 

